Regenerative furnace



4Sheets-Sheet i. H. SWINDELL. S. R. SMYTHE & J. B..SWINDELL.

(N0 Model.)

REGENERATIVEFURNAGB.

310.414.87 1 Patented Nov. 12, 1889.

M11 as 5,. MM wfip b was? 4 Sheets-Sheet 2.

(No Model.)

H. SWINDELL. SMYTHE & J. B. SWINDELL.

YREGENBRATIVE FURNAGE.

Patented Nov. 12, 1889.

/ l/lvg/ (No Model.) 4 Sheets-Sheet 3.

H. SWINDELL, S. R. SMYTHEK: J. B. SWINDELL.

' REGE-NBRATIVE FURNACE.

No. 414,874. Patented Nov. 12, 1889.

.................... g mphnr. Washington. D4 C (No ModeL) v 4 Sheets Sheet 4. H. SWINDELL. S. R. SMYTHE & J. B. S'WINDELL. REGENBRATIVE FURNACE.

No. 414,874. Patented Nov. 12, 1889.

FIG4- hIflr EssEs QMAMM n. PETERS. Pnuwum n mr. Washington, o.c.

UNITED STATES PATENT OFFIC HENRY SIVINDELL, SAMUEL R. SMYTHE, AND JAMES B. SIVINDELL, OE ALLEGHENY, PENNSYLVANIA.

REGENERATIVE FU RNACE.

SPECIFICATION forming part of Letters Patent No. 414,874, dated November 12, 1889.

Application filed April 3, 1889. Serial N- 305,874. (No model.)

To all whom it may concern.-

Be it known that we, HENRY SWINDELL, SAMUEL R. SMYTHE, and JAMEs B. SWINDELL, citizens of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Annealing-Furnaces, of which improvements the following is a specification.

Great difficulty has heretofore been experienced in annealing large sheets or plates of metalsuch as sawson account of the difficulty of uniformly heating both sides of the sheets or plates, one side being protected by the bed of the furnace on which they rest during the annealing operation.

The invention described herein relates to certain improvements in furnaces for reheating or annealing plates or sheets of metal or other material, and has for its object a construction of furnace wherein heat can be applied with practical uniformity on both sides of the plates or sheets, thereby preventing any warping or other distortion incident to unequal heating.

The invention is more fully hereinafter described and claimed. In the accompanying drawings, forming a part of this specification, Figure 1 is a sectional elevation of the furnace, the plane of section being at right angles to the regenerative chambers. Fig. 2 is a similar'view, the plane of section being at right angles to that on which Fig. 1 is made. Fig. 3 is a sectional plan view of the body portion of the'furnace, the plane of section being indicated by the line 0c 00, Fig. l; and Fig. 4 is a horizontal section taken on the line y y, Fig. 1.

In the practice of our invention the regenerative chambers 1 and 1, 2 and 2 for the gas and air are constructed in all essential particulars similarly to the ordinary form of regenerative furnaces, and are provided with the usual fines or conduits for conducting the gas and air to and conducting the products of combustion away from the furnace, and with of a series of tiles or bricks, preferably interlocked, as shown in Fig. 1, and supported by a series of transverse partitions 5, extending entirely across the body of the furnace. Each of these chambers is connected at or near one end thereof with the gas and air regenerative chambers on one side of the furnace by flues 6 and 7, and is connected with the heating-chamber or portion of the furnace above the floor by a passage 8 at the end op posite that at which the inlet-fines are arranged.

By reference to Fig. 3 it will be seen that each alternate combustion-chamber is c011- nected to the regenerative chambers on one side of the furnace, the other chambers being connected to the regenerative chambers on the opposite side of the furnacethat is to say, the combustion-chamber 3 is connected to the regenerative chambers 1 and 2 by flues 6 and 7, while the next adjacent chamber 3 is connected to the regenerative chambers 1 and 2 by flues 6 and 7; and it will also be observed that the combustion-chamber 3 is connected by its passage 8 to the portion of the furnace above the iioor 4 on that side of the furnace on which the flues 6 and 7 a connect the combustion-chamber 3 with the regenerative chambers l and 2, as shown in Fig. 3. Each combustion-chamberis provided at that end at which the lines 6 and 7 enter with a port or passage 9, leading through the outer wall of the furnace, through which access may be had for the purpose of igniting thegas.

In describing the operation of our furnace we will suppose that the valves or dampers are so adjusted that the gas and air will enter in through the regenerative chambers 1' and 2, and the products of combustion will pass out to the stack through the regenerative chambers 1 and 2. The gas and airpass from the'regenerative chambers 1 and 2 up through the flues 6 and 7 on one side of the furnace into alternate combustion-chambers 3, 3, 3, and 3 thence along said combustion-chambers to the passages 8 at the opposite ends thereof into the portion of the furnace above the floor 4, thence across such floor to the opposite side of the furnace, where they pass down the passages 8 into the com- 6 and 7, down such lines into the regenera-.

tive chambers 1 and 2, and thence to the stack. By a reversal of the valves and dampers the flame and products of combustion will pass alongthe fiues 3, 3 3, and 3 ,up through the passage 8, into the portion of the furnace above the floor 4, down the passages 8 on the opposite side of the furnace, along the combustion-chambers 3, 3, 3, and 3 to the fines 6 and 7 thence through the regenerative chambers 1 and 2 to the stack. Thus it will be seen that the flame and products of combustion in each case pass twice along the floor 4c of the heating-chamber and once over the top of the same, thereby thoroughly heating the floor and the under side of any article resting thereon, as well as the upper side of such article, and by such uniform application of the heat to both sides of the article prevent any tendency to warping or distortion of the same.

e claim herein as our invention 1. In an annealing or heating furnace, the combination of a series of combustion-chambers extending across the furnace below the floor of the heating-chamber, passages connecting each of said chambers at one end thereof with the heating-chamber, two sets of gas and air regenerative chambers, a series of fines connecting one set of regenerative chambers with part of the combustion-chainbers at the ends opposite those connected with the heating-chamber, another series of fines similarly connecting the other set of regenerative chambers with the other combustion-chambers, and means for reversing the flow of gas and air and products of combustion, substantially as set forth.

2. I11 an annealing or heating furnace, the combination of a series of combirstion-chambers extending across the furnace below the floor of the heating-chamber, passages connectin g said chambers at alternately-opposite ends to the heating-chambers, gas and air regenerative chambers, fines connecting said regenerative chambers with the combustionchambers at the ends opposite those connected to the heating-chambers, and igniting fines or ports communicating with the combustion-chambers, substantially as set forth.

In testimonywhereof we have hereunto set our hands.

IEIIENRY SWINDELL. SAMUEL R. SMY'IIIE. JAMES B. SWINDELL. \Vitnesses:

R. H. WnIr'rLnsEY, DARWIN \VoLoo'r'r. 

